CVE-2021-22799

Proxy-password disclosure via low-entropy registry encryption

Published Jan 28, 2022 · Updated Aug 3, 2024

Insufficient entropy in Schneider Electric Software Update 2.3.0 through 2.5.1 allows local users to decrypt stored proxy passwords. SESU stores proxy credentials in the Windows Registry using a protection scheme with insufficient entropy, making the password recoverable. Local low-privileged access and configured proxy credentials are required; impact is limited to password disclosure and unintended outbound connections.

CVSS severity3.8
Low
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in Schneider Electric Software Update 2.3.0 through 2.5.1 allows local users to decrypt stored proxy passwords. SESU stores proxy credentials in the Windows Registry using a protection scheme with insufficient entropy, making the password recoverable. Local low-privileged access and configured proxy credentials are required; impact is limited to password disclosure and unintended outbound connections.

The record

CVE
CVE-2021-22799
Published
Jan 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-331, CAPEC-59, T1552.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
3.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy
CAPEC-59Session Credential Falsification through Prediction
T1552.002Unsecured Credentials: Credentials in Registry

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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